Wood plate



March 28-, 1933. K. WINKLER I 1,903,075

WOOD PLATE Filed July 7, 1930 .7?) yen for Karl Wink/er y: MM

Patented Mar. 28, 1933 UNITED STATES PATENT' OFFICE WOOD PLATEApplication filed July 7, 1930, Serial No. 466,260, and in. GermanyJ'ul'y 1, 1929.

My invention relates to improvements in wood plates, and moreparticularly in wood plates composed of a plurality of boards or cleatscombined by gluing and having slits or grooves cut into the same fromthe contacting faces thereof to provide longitudinal passages, theobject of the said slits or grooves being to counteract warping of thewood and to admit air to the inner parts of the glue for uniformlydrying the same. The object of the improvements is to provide a woodplate of this type in which Warping is more effectively counteracted,and drying of the glue is made more uniform, and with this object inview my invention consists in providing the boards, at their adjoiningsides or edges with more than two slits or grooves.

For the purpose of explaining the invention several examples embodyingthe same have been shown in the accompanying drawing, in which the sameletters of reference have been used in all the views to indicate corresponding parts. In said drawing,

Fig. 1 is a sectional elevation showing a wood plate in which the boardsor cleats are provided at the adjoining edges with three slits orgrooves, two of the said slits being provided in one board and the thirdslit or groove in the other board,

Fig. 2 is a similar sectional elevation showing a board in which fourslits or grooves are provided in adjoining boards or cleats, and

Figs. 3 to 5 are similar sectional elevations showing modifications ofthe form and number of the slits.

In the example shown in Fig. 1 the wood plate consists of boards orcleats a disposed one beside the other and glued together with theiredges, the grain of the wood running longitudinally of the adjoiningedges. At the said edges the adjacent boards are formed withlongitudinal slits or grooves b and b, and as shown one of the boards isformed at I the said edge with a single slit 1; and the adjoining boardwith two slits b, the slits b and b of the adjacent boards beingdisplaced with relation to each other, and the single slit 1; beingdeeper than the slits b, so that the volumes of wood cut'from the boardsat the adjoining edges are substantially alike. By

' edges.

thus displacing the slits with relation to each other they may be cutcomparatively deep.

In Fig. 2 I have shown a modification in which the boards or cleats areprovided at their adjoining edges each with two slits or grooves d, andat the left hand part of the plate shown inthe figure correspondingslits d, (1 merge into each other, while at the right hand part of thefigure corresponding slits e, e are displaced with relation to eachother so that they do not merge into each other. While in Fig. 1 theslits b, b are perpendicular to the. adjoining edges of the boards, theyare disposed, in Fig. 2, angularly of the said In the modification shownin Fig. '3 each board is provided at the edge glued to the adjacentboard with three slits f and g, the corresponding slits of adjacentboards being connected with each other so as to provide a singlepassage. The outer slits g are dis osed angularly of the adjoining edge0 the boards, while the inner slits f are perpendicular thereto.

In the modification shown in Fig. 4 the boards are provided at their adjoining edges respectively with two and three slits and 'i, the saidslits being displaced with relation to each other and beingperpendicular to the adjoining ed e.

In Fig. 5 have shown another modification in which the boards areprovided at their adjoining edges respectively with-three and four slitsm and n displaced with relation to each other. Figs. 4 and 5 show thatthe slits z and 'n are cut eeper than the slits h and m.

By providing the boards at their adjoining edges with a large number ofslits warping of the wood plate-is prevented, so that the outer faces ofthe plate remain plane. The

reason for this feature is that the slits are provided in several planeswithin the woods of the plate, and that broad bridges are providedbetween the slits.

I claim:

A plate of wood comprising a pluralit of joined boards arranged side byside an provided in their abutting faces with more than two slits, theslits in one board being displaced relatively to the slits in the other100 board and the slits of one board being covered by the plane edgesurface of the adjacent board, said slits forming passages through theboards to admit air to glue joining the 5 boards and to uniforml drysaid glue.

In testimony whereo' I hereunto aifix my signature.

KURT WINKLER.

